Importing is only possible if the version of the import and export GitLab instances are
compatible as described in the Version history.

The project import option must be enabled in
application settings (/admin/application_settings/general) under Import sources, which is available
under {admin}Admin Area >{settings}Settings > Visibility and access controls.

The exports are stored in a temporary shared directory
and are deleted every 24 hours by a specific worker.